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From any point on the circumference of the circle, draw a line going through the center and continuing until it meets the circumference again.

Measure this line. This is the diameter of the circle.

If the centre is not marked, simply take a ruler and find the widest measure you can make across the circle.

See the related link below, The Parts of the Circle.

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Q: How do you find the size of the diameter of a circle?
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Related questions

How can you find minimum and maximum diameters?

-- Every circle has a diameter of some size. -- All of the diameters that you can draw in the same circle are the same size. -- The smaller the circle is, the smaller its diameter is. There's no minimum size. -- The larger the circle is, the larger its diameter is. There's no maximum size.


How do you find the diameter of a circle with the circumfernce size?

Divide the circumference by pi (~3.14) to get the diameter.


Is the diameter of a circle twice the size of the radius?

Yes, the diameter of a circle is twice the length of the radius.


What is the total diameter of a circle?

It is twice the size of a circle's radius.


What is the are of circle with radius 32.25mm?

If the radius of a circle is twice the diameter. The outer diameter of a circle the size of a circle. 32.25 mm = 1.27 inches


How do you find the diameter of a circle with the width and length?

The width, or the length of a circle are its diameter.


How do you find the DIAMETER if given the circumference OF A CIRCLE?

Diameter of a circle = circumference/pi


How do you find the diameter of a circle using pi?

Diameter = circle's circumference/pi


What are three different size circle?

Each circle with a different radius (or diameter or circumference) is a different size circle.


How do you find the diameter of a circle if you know the circumference?

Divide the known circumference by pi to find the diameter of the circle.


How do you find the perimeter of a semi circle with a diameter of 12mm?

-- Find the circumference of a full circle with a diameter of 12 mm.-- The perimeter of the semi-circle is(1/2 the circumference of the full circle) + (the diameter).


What is the diameter of a skating circle?

The diameter of a skating circle will vary depending on the size of the skating rink. The diameter is determined by measuring from the middle of the circle from one side to the other.